The action is easy to miss after nearly two minutes of nothing happening. If you fast forward you might not see it at all.

1:54 What I believe is the signal flash near the fencing. Lower left of the video.

2:06 You will see sparks from a bullet striking the fencing. A bit higher up than the signal flash, and on the extreme left of the video.

3:01 Toward the middle right of the video, a bullet striking the fencing.

Update: NPR article with timing of events seen in video. They say first flash is also bullet related and not the signal flash I thought it might be.

https://www.npr.org/sections/thetwo-way/2014/02/05/272015606...

There are a few smaller and larger sparks now and then. The resolution, quality and low frame rate renders the entire video more or less useless.

Starting at 1:50 you can see a flash at the bottom, after 2:00 you can see sparks occasionally on the left fence and the fence to the top-right. There's more sparks before 3:00. The video could certainly be shortened.